To pick up an object click on it with mouse button 1. New objects
can be created by picking up their archetypes in the gray area
on the bottom (the "tray"). To place an object in the working area
click at the desired position with mouse button 1; timmy will
refuse to place the object if it would collide with an existing
one. To abort the process -- deleting the carried object -- click
anywhere with mouse button 3. Picking up an object in the working
area with mouse button 3 will duplicate the object.

The following operations can be performed with the keyboard.
w Rotate carried object by 15° to the left.
e Rotate carried object by 15° to the right.
spaceStart or stop the simulation.
del Exit timmy.

The small circles on some objects are "hinges". Two hinges can be
connected by placing them on top of each other. Their relative
position will not change during the simulation; objects are however
free to rotate around them. To undo a hinge, pick up either of
the objects.

The –s option adjusts the speed of the simulation; only integer
values are permitted. It does not compromise accuracy.

SOURCE

/sys/src/games/timmy

BUGS

Timmy's physics may occasionally appear to originate from another
universe.